Ask most Americans what their salary is and they'll tell you instantly. Ask them their net worth and they'll shrug. This is backwards. Salary is what you earn; net worth is what you keep. A $200,000 earner with $500k of debt has less financial security than a $60,000 earner with $200k saved. Calculating net worth quarterly is the single highest-ROI habit in personal finance — takes 30 minutes, transforms every financial decision that follows.

The formula is elegantly simple: Total Assets minus Total Liabilities equals Net Worth. Assets include everything you own of value: cash, checking, savings, retirement accounts, brokerage accounts, home equity, other real estate, vehicles at market value, business ownership, valuable collectibles. Liabilities include everything you owe: mortgage balance, car loans, student loans, credit card balances, medical debt, personal loans, tax owed, business debt personally guaranteed.

Use market value for assets, not purchase price. Your home might have appreciated 40% since you bought it — that appreciation counts. Your car definitely depreciated 30% — use current Kelley Blue Book, not what you paid. Investments use today's balance. This calculator produces the honest number; wishful accounting produces wishful retirement plans.

Liquid net worth is the number that actually protects you. It's the subset of assets you can access within 30 days without penalty or major loss: cash, HYSA, taxable brokerage, money market. It excludes home equity (requires selling or HELOC), retirement accounts before 59½ (10% penalty plus tax), business equity (illiquid), and vehicles (needed for daily life). Aim for liquid net worth equal to 6+ months of expenses before considering yourself financially secure.

The Millionaire Next Door formula gives a benchmark: Expected Net Worth = (Age × Pre-tax Income) ÷ 10. A 40-year-old earning $80,000 should have $320,000 net worth. Someone with double that ($640k+) is a PAW — Prodigious Accumulator of Wealth. Someone with half or less ($160k−) is a UAW — Under Accumulator of Wealth. The formula isn't perfect (undervalues young high-earners) but provides useful directional guidance.

Track monthly during your accumulation years. Nothing motivates savings like watching the number climb. Bad months (market corrections, unexpected expenses) become visible; you can course-correct within weeks instead of years. Good months feel like winning. The dopamine of ticking net worth upward is what turns disciplined savers into obsessive ones — in a good way. Personal Capital (Empower), Copilot, YNAB and simple spreadsheets all work. Pick one and use it monthly.

The FIRE (Financial Independence, Retire Early) community obsesses over investable net worth — excluding primary residence. This is the number that funds your withdrawal rate. If your investable net worth × 4% ≥ annual expenses, you can theoretically retire. A family spending $60,000/year needs $1.5 million invested. Include your home only if you plan to sell and downsize; otherwise it's a housing expense, not a retirement asset.

Use this calculator quarterly at minimum, monthly if you're building wealth aggressively. Track trend, not absolute number. Celebrate every $50k milestone crossed. Combine with our FIRE, Retirement, and Compound Interest calculators for a complete financial planning stack. Export as PDF for annual review with your spouse or advisor.